121324521 has 16 divisors (see below), whose sum is σ = 163912320. Its totient is φ = 79816320.

The previous prime is 121324513. The next prime is 121324523. The reversal of 121324521 is 125423121.

It is not a de Polignac number, because 121324521 - 2³ = 121324513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121324523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101101 + ... + 102293.

It is an arithmetic number, because the mean of its divisors is an integer number (10244520).

Almost surely, 2^121324521 is an apocalyptic number.

It is an amenable number.

121324521 is a deficient number, since it is larger than the sum of its proper divisors (42587799).

121324521 is a wasteful number, since it uses less digits than its factorization.

121324521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616.

The product of its digits is 480, while the sum is 21.

The square root of 121324521 is about 11014.7410773018. The cubic root of 121324521 is about 495.0505284610.

Adding to 121324521 its reverse (125423121), we get a palindrome (246747642).

It can be divided in two parts, 12132 and 4521, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 121324521 in words is "one hundred twenty-one million, three hundred twenty-four thousand, five hundred twenty-one".